.container {
    width: 50%;
    margin-top: 50px;
    margin: 50px auto;
}

.container h2 {
    text-align: center;
    font-weight: bold;
    margin: 1em 0;
}

.form-group {
    margin-top: 30px;
    font-size: 18px;
}

.form-group .btn-lg {
    width: 150px;
    font-size: 1.25rem;
}